creatine kinase comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-03-11. Numbers and descriptions here follow the published literature rather than marketing material.
Creatine monohydrate is a crystalline compound formed from creatine and one molecule of water. Creatine itself is a nitrogen-containing organic acid that occurs in vertebrate muscle and other tissues. The monohydrate designation refers to the water included in the crystal lattice, not to water added during manufacturing. Its chemical formula is commonly written as C4H9N3O2·H2O. The solid is typically a white, odorless powder with low solubility in water at room temperature. It is one of several creatine forms described in scientific and commercial literature.
The compound was identified in the nineteenth century after chemists isolated a nitrogenous substance from meat extracts. Later work established its role in muscle energy metabolism and its conversion to phosphocreatine. Chemical synthesis of creatine followed, and industrial production made the monohydrate widely available as a purified powder. Interest expanded in the late twentieth century when researchers began studying creatine supplementation and muscle physiology. Historical accounts sometimes differ on exact dates and attributions, but the broad sequence from tissue extracts to synthetic production is well documented.
In the body, creatine is obtained from dietary meat and fish and is also synthesized from arginine, glycine, and methionine. Muscle stores creatine and phosphocreatine, which participate in the rapid regeneration of adenosine triphosphate during short, intense activity. The monohydrate form is used in research because it is chemically defined, stable as a dry solid, and relatively inexpensive to produce. Questions remain about whether other creatine forms offer meaningful advantages in absorption or tissue retention, and findings vary across studies and populations.
Creatine monohydrate is a crystalline organic compound formed from creatine and water in a one-to-one ratio. It belongs to the guanidino family and contains a methylated guanidine group attached to an acetate-like chain. The solid is commonly described as a white, odorless powder with a mildly bitter taste. Its molecular formula is C4H11N3O3·H2O, and the hydrated form is the most widely traded grade. The compound occurs naturally in vertebrate muscle and brain tissue, where it participates in rapid energy buffering.
In aqueous solution, creatine monohydrate exists mainly as a zwitterion, carrying both a positive guanidinium charge and a negative carboxylate charge. This charge separation raises water solubility relative to many neutral organic solids and helps explain its behavior in analytical separations. The monohydrate can lose its water of crystallization under sustained heat or low humidity, converting toward anhydrous creatine. Such transitions matter for mass balance calculations because the hydrate contributes water mass that is not part of the active creatine molecule.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C4H9N3O2·H2O | Monohydrate includes one water molecule per creatine molecule |
| Molar mass | 149.15 g/mol | Value for the monohydrate; anhydrous creatine is about 131.13 g/mol |
| Appearance | White crystalline powder | Odorless or nearly odorless in purified form |
| Solubility in water | About 13 g/L at 25 °C | Solubility increases with temperature and varies with pH |
| Common synonyms | Creatine hydrate; N-(aminoiminomethyl)-N-methylglycine | Monohydrate distinguishes it from anhydrous creatine |
Quality control for creatine monohydrate typically combines identity, assay, and impurity tests. High-performance liquid chromatography with ultraviolet detection is common for separating creatine from creatinine and related substances. Nuclear magnetic resonance and infrared spectroscopy can confirm molecular structure, while titration may assess acid-base content. Moisture content, heavy metals, residual solvents, and microbial limits are checked according to applicable standards. These tests help distinguish compliant material from powders that have degraded, been diluted, or contain manufacturing residues.
Handling practices aim to limit moisture uptake and thermal exposure. Containers should stay closed when not in use, and storage areas should avoid direct sunlight, strong heat, and high humidity. Caking can occur when powder absorbs water, even if the creatine itself has not fully degraded. Aqueous stock solutions are best prepared fresh when needed because they are less stable than the solid. Open questions include how different excipients, packaging materials, and climate conditions affect long-term stability across global supply chains.
As a supplement, creatine monohydrate is studied for its effects on muscle performance and recovery. The compound is often described as an ergogenic aid, meaning it may support physical work capacity. Research typically compares it with placebo or other forms, such as citrate or nitrate, under controlled conditions. Questions remain about the optimal dose and long-term effects in different populations, and findings are not uniform across all studies. The monohydrate form remains the most extensively tested.
Creatine monohydrate is a crystalline compound formed from creatine and one molecule of water. Its systematic name is N-(aminoiminomethyl)-N-methylglycine monohydrate, and it appears as a white, odorless powder with limited solubility in water. The monohydrate is the most common solid form used in research and commercial products because it is stable under dry conditions. The anhydrous form lacks the water of crystallization and differs slightly in molar mass. Both forms participate in the same biochemical reactions once dissolved.
In the body, creatine is synthesized from the amino acids arginine, glycine, and methionine, primarily in the liver and kidneys. It is transported to muscle and other tissues, where it is phosphorylated to phosphocreatine by creatine kinase. This phosphagen system provides a rapid source of adenosine triphosphate during short, intense contractions. Dietary creatine comes mainly from meat and fish, and the body's total pool is influenced by both synthesis and intake.
Manufacturing processes can leave trace amounts of dicyandiamide, creatinine, or residual solvents, depending on the synthetic route and purification steps. Heavy metals, arsenic, and microbial contamination are also monitored for food or pharmaceutical grades. Particle size distribution can affect dissolution behavior and blending uniformity, so it may be specified for certain applications. Analytical results are reported on a dry basis or as-is basis, and the difference matters when comparing certificates of analysis. Open questions remain about how minor impurities influence long-term stability under varied storage conditions.
Stability studies typically examine the effects of temperature, humidity, and light on creatine monohydrate. Sealed containers stored in cool, dry conditions help limit moisture uptake and hydrolysis. Elevated temperature and high relative humidity can accelerate conversion to creatinine, especially in aqueous solutions. In solid dosage forms, excipients and processing steps may also affect stability. Published stability data are not fully consistent across studies because test conditions and analytical methods vary.
Lately Chair, Cwm Taf Morgannwg University Health Board. For services to the NHS and Mental Health Services in Wales. Gregory Elliot. Senior Officer, National Crime Agency. For services to Law Enforcement. Stuart John Ensor. National Chair, Royal Air Force Air Cadets. For voluntary service to Young People. John Neil Everitt. Chief Executive Officer, National Forest Company. For services to Conservation. David Farnsworth. Managing Director, City Bridge Foundation. For services to the Voluntary Sector in London. Dr. Oliver Robert Ford Davies. Actor. For services to Drama. Professor David Foskett, MBE. Lately Head of Hospitality, University of West London. For services to the Hospitality Industry and to Inclusivity. Mischa Kate Foxell. Deputy Director, Cabinet Office. For Public Service. Travis Dylan Frain. Campaigner. For services to Counter Extremism and to Victims of Terrorism. Janie Lorraine Frampton. For services to Equality for Women in Sport in the UK and Abroad. Rachel Gaisburgh-Watkyn. Managing Director, Tiny Box Company. For services to Sustainability, to Ethical Business Growth and to Exports. Anthony Gallagher. Chair, National Youth Sector Advisory Board. For services to Young People. Katie Gallagher. Director, Manchester Digital. For services to the Digital Technology Industry in the North-West. Mark Robert Timothy Garnier, MP. Member of Parliament for Wyre Forest. For Political and Public Service. Sandra Godley. For charitable service to the community in Coventry, West Midlands. Bruce Malcolm Gordon. Chair and Founder Member, Honorary Treasurers Forum.
The life science training pathway for clinical scientists follows a similar pathway to that undertaken by medically qualified specialist registrars in pathology. Clinical scientists are therefore the only discipline of non-medical healthcare professionals examined by a Medical Royal College. Clinical scientists who attain both part 1 examination certification and part 2 certification are awarded Fellowship of the Royal College of Pathologists (FRCPath) and are deemed to have the knowledge and expertise expected of a consultant level scientist. Consultant clinical scientist posts generally require candidates to have completed FRCPath qualification to be eligible. All clinical scientists regardless of seniority or specialisation may have other responsibilities including academic appointments, responsibilities as clinical lead for a pathology service, or may have wider hospital responsibilities such as directorship of Infection Prevention and Control, or responsibility for the hospital's Research and Development strategy. Junior clinical scientists may become involved in academic research, working towards a Ph.D. or DClinSci.
=== MasSpec Pen analysis mechanism === The MasSpec Pen, initially described in 2017, is a solvent-based ambient ionization technique but differs from its predecessors due to the handheld nature of the device, allowing analysis of samples distant from the mass spectrometer in a geometry independent manner. The MasSpec Pen used a probe that can be manipulated by hand to direct the analysis. To use the system, the tip of the 'pen' is placed in contact with the surface to be sampled and the user triggers the initiation of a sampling procedure by pressing an integrated foot pedal. This signals a syringe pump to deliver a small aliquot of solvent through a polymer tube to a reservoir at the tip of the 'pen' that remains in contact with the sample. Analytes are then extracted from the sample into the solvent droplet by a solid-liquid extraction mechanism. After a 3 second extraction period, the droplet is aspirated into the mass spectrometer using the vacuum from the mass spectrometer as the vacuum source. Once inside the mass spectrometer, the analytes within the solvent droplet are de-solvated and ionized via an inlet ionization mechanism. The ionized molecules are then analyzed by the mass spectrometer analyzer and the mass spectrum resulting is generated.
Sources: en.wikipedia.org
==== Apixaban ==== The first full synthesis of apixaban was published in 2007. The key step of this reaction is a (3+2)cycloaddition of a p-methoxyphenylchlorohydrazon derivate and a p-iodophenyl-morpholin-dihydropyridin derivate. After the following elimination of HCl and morpholine, the iodine is substituted by 2-piperidinone by copper-catalization and the ethyl esther is converted to an amide (aminolysis). This reaction was registered as a patent in 2009.
== History == The use of snail slime in cosmetics and pharmaceutical applications dates back to ancient Greece, where it was recommended as a treatment for skin inflammation. Early practices involved crushing secretions from brown garden snails to help alleviate inflammatory skin conditions. This approach is part of a broader tradition known as zootherapy, which has existed since ancient Mesopotamia and Egypt and involves the use of animal-based remedies for healing. Additionally, snails were known to be high in nutrients and as a delicacy to be eaten.
=== Cephalosporins === After the war ended, Florey directed his team at the Sir William Dunn School in the investigation of antibiotic substances produced by plants and microorganisms. They studied claviformin, proactinomycin, helvolic acid, mycophenolic acid, hirsutic acid, bacitracin and micrococcin. In 1949, they published Antibiotics: A Survey of Penicillin, Streptomycin, and Other Antimicrobial Substances from Fungi, Actinomycetes, Bacteria and Plants, a massive two-volume work. Florey also edited Lectures on General Pathology, which was published in 1954. Chain departed in 1948, but Guy Newton joined the team in his place as its biochemist. Financial support came from the Medical Research Council, the Albert and Mary Lasker Foundation, and American pharmaceutical companies. In September 1953 Newton and Abraham isolated crystalline cephalosporin C from a fungus originally isolated by Giuseppe Brotzu in Sardinia, and found that it had antibiotic properties. Their initial evaluation of the antibiotic activity of cephalosporin C was that it was low, so Abraham sent Florey, who was in Australia, a letter asking if research should continue. Florey saw an intellectually challenging line of research, and told them to continue. They found that it was resistant to penicillinase produced by gram-positive bacteria. When he returned to Oxford, Florey and Jennings conducted a series of experiments that determined that it was not toxic to mice but could protect them against streptococci and penicillinase-producing staphylococci.
==== Civil lawsuit alleging personal use of publicly funded office ==== In 2013, Hastert's former business partner J. David John filed a lawsuit in the federal district court for the Northern District of Illinois, alleging that Hastert misappropriated federal funds for his post-speakership office in Yorkville for personal use, including private lobbying and business projects. This suit was filed under the qui tam provision of the False Claims Act (FCA), an anti-fraud statute that allows a private party to pursue a case on behalf of the federal government. In the suit, John asserts that he told the FBI in 2011 that "he had knowledge that Hastert was using federally funded offices, staff, office supplies and vehicles for personal business ventures." John, a businessman from the Chicago suburb of Burr Ridge, Illinois, also said that he traveled with Hastert and collaborated with him on "a planned Grand Prix racetrack in Southern California and sports events to be organized in the Middle East" as well as other projects. Hastert denied any wrongdoing. The allegations about the use of the former speakers' office first drew the attention of federal investigators in 2013, leading to the federal indictment in 2015. In April 2017, Kocoras dismissed the suit, finding that John did not qualify as a "whistleblower" under the FCA. John's attorney said that an appeal was possible.
Sources: en.wikipedia.org
== History == Orinase was developed by Upjohn Co. at a time when the primary medical treatment for diabetes was insulin injections. Eli Lilly had a lock on the market for insulin production at the time. The practical applicability of Orinase, like that of other treatments for disease states detected by paraclinical signs (such as lab test results) rather than clinically observable signs or patient-reported symptoms, benefited from increased sensitivity and availability of testing (in this instance, urinary glucose testing and later also fingerstick blood glucose testing). Milton Moskowitz (editor in 1961 of Drug and Cosmetic Industry) claimed that the introduction of Orinase, "expanded the total market by bringing under medical care diabetics who were formerly not treated." It did this by changing the mindset about diabetes even more than insulin had. Treatment of this chronic disease was no longer seen as a mere slowing of "inexorable degeneration", but instead viewed through "a model of surveillance and early detection." Orinase and other sulfonylureas emerged from European pharmaceutical research into antibiotics, specifically from attempts to develop sulfa compounds. One of the contenders for a new sulfa antibiotic had serious side effects during clinical trials at the University of Montpellier including blackouts, convulsions, and coma, side effects not observed with any other drugs in the sulfa cohort. An insulin researcher at the same university heard of these side effects and recognized them as common results of hypoglycemia.
A specialty of Malang, the rough-textured tempeh menjes kacang is made from black soybeans mixed with other ingredients, such as peanut dregs, cassava fiber, and soybean meal. The process of making menjes kacang is quite similar to black oncom.
=== Professional === Lisa attended her first IFBB professional competition at the 2014 Tampa Pro, where she placed 16th place. In 2015, Alina Popa became her coach and started training at the Armbrust PRO Gym. Her training paid off when she went on to win the 2015 Omaha Pro, the first time a professional British female bodybuilder won an overall professional competition since 1999.
In the 16th century, European slave traders had begun to bring enslaved Africans to the Americas. Spain was the only European power that did not establish factories in Africa to purchase slaves; the Spanish Empire instead relied on the asiento system, awarding merchants from other European nations the license to trade enslaved peoples to their overseas territories. This system brought Africans to Colombia, although many spoke out against the institution. The indigenous peoples could not be enslaved because they were legally subjects of the Spanish Crown. To protect the indigenous peoples, several forms of land ownership and regulation were established by the Spanish colonial authorities: resguardos, encomiendas and haciendas. However, secret anti-Spanish discontentment was already brewing for Colombians since Spain prohibited direct trade between the Viceroyalty of Peru, which included Colombia, and the Viceroyalty of New Spain, which included the Philippines, the source of Asian products like silk and porcelain which was in demand in the Americas. Illegal trade between Peruvians, Filipinos, and Mexicans continued in secret, as smuggled Asian goods ended up in Córdoba, Colombia, the distribution center for illegal Asian imports, due to the collusion between these peoples against the authorities in Spain. They settled and traded with each other while disobeying the forced Spanish monopoly.
=== Neurotoxicity === Mephedrone has been found to be a monoaminergic neurotoxin in animals and induces serotonergic neurotoxicity. Although some studies in animal models reported no damage to dopamine nerve endings in the striatum and no significant changes in brain monoamine levels, some others suggested a rapid reduction in serotonin transporter (SERT) and dopamine transporter (DAT) function. Persistent serotonergic deficits were observed after binge-like treatment in a warm environment and in both serotonergic and dopaminergic nerve endings at high ambient temperature. Oxidative stress cytotoxicity and an increase in frontal cortex lipid peroxidation were also reported. Although mephedrone has been found to be a monoaminergic neurotoxin, in one study, moderate doses of MDMA produced serotonergic neurotoxicity in rodents whereas mephedrone and methylone did not do so, suggesting that cathinones like mephedrone may be less neurotoxic than their corresponding amphetamine counterparts like MDMA.
Sources: en.wikipedia.org
It is a crystalline form of creatine that contains one water molecule per creatine molecule. The compound occurs naturally in muscle tissue and is also produced synthetically for research and consumer products. The monohydrate label describes the solid's hydration state.
Creatine monohydrate contains creatine, but the two terms are not strictly interchangeable. The monohydrate includes water in the crystal, while creatine refers to the base molecule. Other creatine forms pair the molecule with different acids or carriers.
Dietary creatine is found mainly in meat and fish. The human body also synthesizes creatine from amino acids in the liver, kidneys, and pancreas. The monohydrate powder used in products is manufactured rather than extracted directly from food.
In common usage, yes, but technically creatine monohydrate is one specific hydrated salt form. Other creatine forms exist and differ in composition and properties. The monohydrate is the most studied and most widely available grade.